The "15 Most Badass Swords in Game History" article by Gamespot is full of shit.
The Keyblade? How is that badass? Looks so stupid.
You include Rebellion from DMC, but show a picture of DmC's Rebellion. Wut?
The Time Dagger? Hmmm yeah good choice... if it was a sword.
*facepalm*
Since when was Gamespot a place of intelligence?
I know of a few swords that everyone can agree on. In no particular order:
1. Dancer from The Witcher 2
2. Deithwen from The Witcher 2
3. Caerme from The Witcher 2
4. Soul Reaver from The Legacy of Kain series
5. Nobitsura Kage from Shadow Warrior
6. Sparda from Devil May Cry 1
7. The Chaoseater from Darksiders
8. Dragon's Tooth from Deus Ex
9. Ultima Weapon from Final Fantasy
10. Zantetsuken from Final Fantasy
How's that?